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Isotopic Analysis and Cycling of Dissolved Inorganic Carbon at Lake Biwa, Central Japan

Published online by Cambridge University Press:  18 July 2016

Toshio Nakamura ,
Sadao Kojima ,
Tomoko Ohta ,
Hirotaka Oda ,
Akiko Ikeda ,
Mitsuru Okuno ,
Ki-Ichiro Yokota ,
Yoshihiko Mizutani  and
Wolfgang Kretschmer
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Abstract

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This paper reports on concentrations and carbon isotopic results of dissolved inorganic carbon (DIC) in water samples collected at four locations and from several depths in Lake Biwa, central Japan, covering every season of the year, starting in the spring of 1995. Depth profiles of DIC concentration and DIC δ13C showed a strong seasonal pattern, as a result of vertical mixing of the lake water in winter and early spring, or lack of mixing in the other seasons. No seasonal change in DIC ∆14C depth profiles was recognizable, mainly owing to the wide scatter of DIC ∆14C. Values typically ranged from 0.47 to 0.65 mmol kg-1 for DIC concentration, and from -4 to -8‰ and from +10 to +80‰ for DIC ∆13C and DIC ∆14C, respectively, for the Lake Biwa water.

Type
Part 2: Applications
Information
Radiocarbon , Volume 40 , Issue 2: 16th International Radiocarbon Conference June 16-20, 1997 Part 2: Applications, Conference Editors: Willem G. Mook Johannes van der Plicht , 1997 , pp. 933 - 944
Copyright
Copyright © The American Journal of Science 

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